Sharpener for slicing-machines



H. ST SHARPENER FOR SLICING MACHXNES.

-UKAM- Patented Ffab. 2%, 1920.

APPLICATION FILED JULY l0. 1916.

STUKART. SHARPENER FOR SLICING MACHINES.

3 SH rTS--SHEET 2.

aten'ed Feb. 2%, i920.

APPUCATION FILED JULY l0, i916.

gmk

3 SHEETS-SHEET 3.

I I II ildill I Patented Fb. 2%, 1920.

STUK/IRT. SHAHPENER FOR SLICING MACHINES.

APPLICATION FILED IULYVIO, I9I6.

f @ma Application zf'led July l0,

Imm may concer-n: 't known il :il: l', HENDRIK STUKAM, z:- of the u@neenoi' Holland, residing te, in the county oflnipore and Simile of indiane,here inrened certain new incl useful improvements in Sharpeners forSiieing-lilaciiines, ef which the iioliowing is Speeieation Thisinvenliiem relates to mechanism: for sharpening the slicingI knives ofmachines used for slicii l' .ii-nii other nmeriul, Wliirli is ore-iii1Minte iliin slieen before being d ieiieiisecl to 'ille -r:i le

The object iiieinveniion ie 'io provide. mechanism of the here/@eernenied which iii be of improved eonetrnction and elli A cie-,n 1noperati The, invention exempined in the conininniion :1nd arr: ngementim. shown iie :ieeonipen ing drawin nie following' specifi is mais, Amidescribe and it 1,9 more pnrienlarly peiniefl "iden Claims.

E U ."1 .i "ii" 1 J v. A' 'l An ine innige, ignie i 1: :i willemSeelonei View :Ellrongli :L poriion of :i slicing machine showing; ineinbodimeni .of he inljeni-ion applied lierel'o; ifig. 2 is Calserlioinil View on line 2 2 of horizontal sectional rien' #l :iVerilcennnon use, iiY

1Eli linile. lnu'- iievelell te form tne eneeclge .i'or ille nniierinlupon .rliirli l'he nmeliine oprnies. ln order thai 'ille mnenine may:ieeui'niely Cnt l'liin slieee olf imiforin lillielness from innierinieneilj: invhein :is iter ellnnile rocked imm. it is n eeemiry ilni lilielieielell periphery oi" ille miti-ing" disk :lnill lne kept very sinirp,:xml edge, lqepl; irne :unl :leenraie if 'has been usuel hereioore toprornle :i ro'mry frhling @Isig having :i beveled surl'm-e :ir-

rnngred io be spring-pressed ngi-:inist ille beveie l periphery of 'illelni'lie. in :iflfliiion io llie ,g'rinfier fior ille beveled edge of theknife, il, inw been usual io provide :in :mxilinrgY wheel for renim'inp;lie bnr from the opposite :wlge of ille (liek :i'iier lle malin rimlingiOperniion luis been These, features ere, sili reinined in the. preeeninveniion, lint ille oporuiien oi' time main grinding wheel lnis `beenrznliezilly :'lmnggei'l.

'lierelm'ifn'e llas been illeI practice to Serie-.l fn 395,205.

mount ille cutting ltnie :i possible einen new.) en that in snbsequen'ting knife, regardless of Whether lzlie edge remains true or not. El;iras been found that Where 'this construction is used for Sonie lengt-liof ime, tie knife gre ily loges its originel :ieeinzn'ys and thee beginste wnbble, not b inse of play in the bearings, imi because oi elle feetthat the position of lille erige itself :it various peinte on theperiphery of ille knife has shifted., clue to the grinding opern'ion. iflhere should clninee te be :i` portion of the knife hat is :i littletime oil zr porions, is :ipparen that lilie sharpening 'wheel will cui;more ragiilly on this portion bilan on elllen;z :md if the wlieei isuniformly Spring-pressed againstnli portions of die periplieiya eachsiniriening operation will deepen Ithe depression miele :it liis sofi,portion of'tlie knife, time musing ille edge :Lt this point to ref-elle,from the general :ilineinent of the knife.. inegi :ilse happen illee.smell piece, is broken 'from the :e of the knife by eine means, :unlwhen "ellis occurs5 under the old con. rnetion, the frrinCler Will bepreseel ino the niek eline formeel, nid insiemi oi: the entire. knifebeinga ground io forni :i new exige. Wliieli shell be in truenlinenienJH zi'no'ell is gi'enmi in die lmile al; the, pimiion Wlierethe original niek was formeel, illus shift-ing' the position of the edge:it this point, The, ultimate resul of sugli i"riniling is always; 'loproduce :i more or less inaeenrnely :dined edge. which will prodnreunevennees in the thickness of Elie eliees wliieli meent. The presentinvention, in' n'leelnmiram which will loe described, overcomes this(lillienliv.

A second liefert of the old construction is due io the fuel, llnr'e the.rotation of the grinding knife has heretofore been produced` the presentinvention, with the result that a more efficient sharpening action isprocured between the grinder and the edge of the knife. ,l j

In the figures of the drawings, the numeral 1 designates the frame-workof a slicing machine, havinga table top 2, over which the carriage forthe material to be' i the mechanism which it contains.

sliced'is reciprocated to bring the material into position to beoperated upon by the slicing knife 3. A drive shaft 4 is rotated in theusual manner by mechanism, not shown, and carries a sprocket wheel 5,'driving a sprocket chain 6, which rotates a second sprocket wheel 7,secured to a shaft 8, on which the slicing disk 3 is mounted. By thismechanism, the disk is rotated during the cutting operation. Thesprocket wheels and chain are inclosed in a hollow casting 9, whichforms a casing for this mechanism, and which is provided with a bearing1() at its upper end for the shaft 8.-

Projecting upwardly from the bearing 10, is a pair of abutment or wallmembers 111, between vwhich a base 12, of a socket member 13, ispositioned. Lag screws 14 hold the base 12 in place and project throughelongated slots 15, arranged to permit a slight adjustment of the socketmember 13 toward and away from the cutting knife 3. Mounted. forvertical adjustment in the socket 13, is an upright 16, which is prefvented from rotation in the socket and held in adjusted position by aset screw 17, op erating in a slot 18, in the upright 16. At the upperend of the upright 16, is an arcuate bracket 19, provided with bearings20 and 21 at the upper ends of the two arms thereof respectively.Mounted in the bearings 20 and 21 foil pivotal movement about ahorizontal axis, is a hollow casing 22, which is approximately sphericalin shape, and which may be formed of two sections in order to facilitateassembling of A bolt 23 is provided with a square head 24 embedded in acorresponding recess in the casing 22, the bolt being journaled in thebearing 20, as shown in Figs. 2 and 3. The bolt 23 is provided with asquared portion 25, on which ismounted an arm 26, havin'r a finger piece27 atihe outer end thereof. A pin 28 projects from the arm' 26 on theside opposite the finger piece 27, and cooperates with depressions in anarc-sha ed bracket 29, secured to the bearing 20. y this construction,the casing 22 may be rotated to dilfcrent positions about its horizontalaxis, and held in these positions by the pin 28 projecting into thedepressions in the holding bracket 29. The pin 28 may be springpres-sed,or the arm 26 may be made suiiiciently resilient to permit shifting ofthe vpin into and out of the depressions.

J ournaled in the bearing 21, is a sleeve 30,

' The arms of tne bracket 32 carry at their extremities alining bearings34 and 35 respectively. A beveled pinion 36 is journaled in the bearing34, and a sleeve 37 is mounted in the bearing 35 and is movablelongitudinally thereof. The opening in the bearing 35 is enlargedthroughout a portion of the leuffth thereof as shown in Fi 3, toaccommodate a coil spring 39, which bears at one end against a shoulder4() on the bearinfT and at' the other end against a shoulder 41, formedby an enlarged portion 4t2', of the sleeve 37. le spring 39 normallytends to force the sleeve 37 outwardly, as will be readily understood. Ashaft 43 passes through the sleeve 37, and is free to rotate therein.The enlarged portion 42 of the sleeve 37 extends through an opening 45in the side of the casing 22 adjacent the knife 3, and a Grinding wheel46 is carried by the shaft 43 in a position adjacent the periphery ofthe knife 3 and on the outside of the casing 22. The portlon of thesnaft 43 which extends through the pinion 36 is provided ivvith aflattened portion 47 to cause the shaft to rotate with the pinion, butto permit the shaft to move longitudinally relative thereto.

A shaft-48 isjournaled in the sleeve 30 and carries a beveled gear 49 atthe end thereof,within the casing 22, in position to mesh with thebeveled pinion 36. Secured to the opposite endvof the shaft, beyond thebearing 21, isra second beveled. pmion 50, which meshes with a pinion51, carried on the upper erd of a vertical shaft 52, journaled in an arm53, which extends laterally from the bracket 19. The lower end of theshaft 52 is journaled in a bearing 54, carried by a laterally Kextendingbracket 55, securing to the casing member 9. The lower end of the shaftis provided with a beveled pinion` 56, meshing With a beveled pinion 57,carried on a shaft 58, journaled in a bearing 59, extending through thecasing member 9. Secured to the end of the shaft 58, within the casing9, is a beveled pinion 60, which meshes with a beveled Wheel 61, mountedto rotate freely on the drive shaft 4. The gear 614 may be clutched tothe shaft 4 by a friction clutch 62, operated by a hand knob 63 andclutch rod 64, arranged to move in an opening 65 in the end of the shaft4. When the gear 61 is clutched to the shaft 41 and the machine isoperated, thetheirA "would he imparted to it hy simple frictionelContact hetvveen the grinding Wheel and the cutting knife. The directionot rotation of the gear of the grinder 46 is preferably such .that theoperating portion of the Grinder will move toward 'the edge losingsharpened, The 'vertical position of the grinder, relative to the knife,may he regulated by adjusting the upright 1 6 in the socket 13, theupright being held in position after it has been adjusted by the setscrew l?. In order that this edjnstment may not interfere with theoperation or the shaft 52, this shaft is provided with eneitiensioncoupling 66, as shown in Fig'. 2.

e grinder 5K3 is provided With beveled edge 67, which bears against thebeveled portion of the knife 3, as indicated in i. n order that theposition of the grinding edge of the Wheel 4.6 may he accurately ad-"usted relative =to the edge of the knife, the i racket 32 may 'oeshifted in the casing 22, end held in adjusted position by vthe setscrew 3l. The opening 45 through which! the sleeve Li2 extends isoblong' in shape, as shown in Fig. 2, tor the purpose of permit'- tingmovement of the bracket 32 and the grinding Wheel 46 into variousadjusted positions relative to the casing 22. The bracket 32 is soshaped that the axis on which the Wheel 46 rotates stands at en obliqueangie to the piene ofthe knife 3, in order thaty the beveled surace 67may hear properly against the edge oii5 the knife. v

lThe grinder Wheel 46 is normally torced outwardly against the cutter 3by means of the coil yspring 39, To hold' the grinder n away from theknife, When the knife is not being' sharpened, the sleeve 37 is providedwith a rigidly attached arm 68, on the end.

of which is mounted a cam roller `an ranged tov hear against the camsurface ot a wheel 70 mounted for rotation on a shaft 7i, secured to andprojecting inwardly from one side of the casing 22. A coil spring 72 issecured to the cani Wheel 70 and the shaft 7l, and normallytends torotate the Wheel to the right, es Viewed in Fig. 3. The Wheel is'carried by a hub 73, which has a handle or lever 74e secured thereto,arranged to project upward-ly through a slot '75 in the casing 22,es.shown in Figs, l and 2. The lever '(4 may loe moved in a clockwisedirection, as Viewed in Fim 2, against the tensior ofA the spring 72,and secured in two atl gusted positions by a sliding detent 76, Whitvcooperates with openings 77 and 78 in the' casing 22, which ere ofgreater diameter than the ividth of the slot 75, and into which thedetent 76 may be moved by any .welll lmown operating mechanism carriedby the handle 74. The cam surface 80, shown in broken lines in F10. 3 isso shened that the b a .lf

first result of the movement or the lever Ze to the right, is to permitthe Wheel Lidto the hearing 3o, cnrried en tu in opening 86 of greeterliar space hetiveen the projections through the hearing to the sleeve frfriction shoe Si" is located in the openii and a coil spring 88positioned opening between the fri-:filon shoe S5 the short end of thelever i the iirst pe-rt of 'the movement oi' the 7i, and until the arnilies hee l leased by the cani sin-tace 8O to permit the grinder Wheel i6to moved into Contact 9G with the knife 3, the erm 82 hears upon aportion of the cam 8l, which is concentric with the shaft 7i. After thegrinder 4G has moved intocontnct with the ltni, 3, end is held in thisposition the against. the tension1 or ringv 39, ie active portion"of thecan) contacts 'iv .ii the lower surface ot the lever and forces thelong; end or' the lever upwardly, thus causiirg` coinpression ot thespi/'ingI 88 to force the iric- 1o tion shoe 87 treinstthe sleeve El?.in this wey, the shoe 87 is held against the sleeve 3i' by resilient i"rce lsuilicient to prevent any further movement of the sleeve in alongitudinal direction. The grinder il is thus los eratio the ment whenthe ,grinding oL nleterl, The parts are so pro the erin 58 will firstlaere `friction shoe 87 subseque i y locking contact with the sleeveIl?, moth operations being completed when the lever luis been moved asniicient distance to causo e detent 76 to register with the opening t?which marks the rst opcinting iliosition or" the lever Tet.` Duringfurthe:- movciucnt ot' the lever 74 to the right. as shown in Fics. 2, 3and si, :e second concentric poi-tion of ,e cam ell will coperzito withthe lover and continue to hold the friction shoe 2? in iol-lei715, inL'contact with the 'sleeve Si'. Y

n second grinding' Wheel 90 secured to the cud of :t shaft Si. :intlliclil in position on the sido ol" the lcniife opposite 'lzsi' occupicdhy the grinder over the cam surface 96 on the wheel 70, and

. ger piece 27 and the ar mounted for rotation within a sleeve 92, butconstrained to move longitudinally with the sleeve. The sleeve 92 iscarried by a bearing cylinder 93, secured to the casing 22, and isfreeto move longitudinally within the cylinder. A coil spring 94normally tends to force the sleeve 92 inwardly to draw the grinder 90against the outer surface of the blade 3. A cani roller 95 is secured tothe sleeve 92, and bears against the ed e of the cam 70, opposite thatagainst w ich' the roller 69 bears. The cani roller^`95 noi'- mallyholds the grinder 90 away from the blade 3 against the. tension of thespring 94. When, however, the cani 70 is moved by the lever 74 past theposition in which the lever is held by the opening 77, the roller 95moves permits the inner surface of the grinder to be drawn against theouter portion of the blade 3. While the lever is in this position, thegrinder 46 remains locked in its operating position by the cani 81 andthev friction shoe 87. The detent 76 ma be moved into the opening 78 toretain tie parts in this position as long as desired. This need not bemo-re than a sufficient time to permit one or two rotations of the blade3, since all that the grinder 90 is intendedto do, is to remove any burthat may be formed by the grinder. 446. Since no actual grinding isdesired on the part ofthe wheel 90, this wheel need not be positivelydriven, as in thecase of the wheel 46, but may depend for its rotationupon the frictional contact between the grinder .and the knife.

- After a sharpening operation has beencompleted, the lever 74 is'permitted toreturn to its initial position under the influence' of thespring 72, thus moving the grinders 46 and 90 away, from the knife 3. Inorder to further move the grinders out of operative position and awayfrom the knife, the entire casing 22 maybe rotated' about its horizontalaxis by moving the fin-4 26, to rotate the casing in a counter-clockwisedirection, as viewed in Fig. 1. This will move the grinder wheelsupwardly away from the knife into a position in which they are held bythe pin 28 until it is desired to repeat the sharp i knife, a Sharpenerfor said knife adjustable' ening operation.

1. In a slicing machine having a rotary slicing knife, a Sharpener forsaid knife, means for rotating said slicing knife, and separate meansfor operating said Sharpener while in contact with said knife, saidseparate means being arranged to impart a lin ear speed to theportion ofsaid Sharpener contacting with said knife, differing from the linearspeed of the portion of the knife with which it contacts.

2. In a slicing machine having a movable slicing knifeha movableSharpener for said 'relative thereto, and transmission mech# power tosaid *sharp-f knife, and separate driving means for iinpartingsimultaneous movements differing in speed to said Sharpener and knifewhile they are in contact with one another and while said knife is inoperative position on said machines.

3. In a slicing machine having a rotary slicing knife, a rotarySharpener for said knife, and separate driving means forl impartingsimultaneous rotation to said sharpener and knife while they are incontact with one another and while said knife is in operative positionon said machine, theliuear speeds of the contacting portions of saidSharpener and knife differing from one another.

4. In a slicing machine havin a knife, and means for simultaneously.imparting independent rotation to said sharp#-` ener wheel and knife inapproximatel the saine direction while said wheel and ,'fe are incontact with one'another and while machine, the linear movement 'of thentacting parts of said wheeland knife di ering in speed. 5: In a slicingmachine, a drive shaft, a slicing knife means for connecting said shaftwith said knife to rotate said knife,'a

`:said Sharpener, said connecting means being arranged to permitadjustment of said Sharpener without breaking the drivin connectionbetween said Sharpener and sai i driving device.

7. In a slicing machine, a driving device, a Sharpener, and extensibletransmission mechanism for driving said 'Sharpener-from said drivingfdevice and j for permitting adustment of said Sharpenerl withoutbreakii'ng the dri'ving connection'between said Sharpener and saiddriving device. Y

8. In a slicing machine having a slicing nisni for imparting ener, saidtransmission'mechanism being ar-- ranged to permit adjustment ofsaidsharpener vrelative to said knife without interfering with thetransmission ofl power thereto.

9. In a slicing machinehaving a rotary slicing knife, a drive shaftmeans for connecting said knife with sind drive shaft to. drive saidknife, a Sharpener wheel for saidknife, and transmission mechanism forimparting klr'novement from said knife to said- -slicing knife, aSharpener whee for said I` l -said knife is in operative position onsaid of said knife to cause the various portions of said edge to travelin the same cutting plane when Said knife is rotated.

28. lIn a slicing machine having a rotary slicing knife, a vgrinder fortruing the edge said knife, means independent of said knifel foroperating said Sharpener, and means for preventing said Sharpener frommoving bodily relative to Said knife during a sharpening operation.

' 30. In a slicing machine having a rotary slicing knife, a Sharpenerwheel for said knife. separate means for rotating said knife andSharpener wheel while in contact with one another forsharpening saidknife, and means' for preventing movement of said Sharpener Wheelrelative to the cutting plane of said knife during a sharpeningoperation.

31. In a slicing machine having a rotary slicing knife, a Sharpener forsaid knife, means for-moxfing said Sharpener toward and away from saidknife, and means for locking said Sharpener against such movement.

32. In a'slicing machine having a rotary 'slicing knife, a Sharpener forsaid knife,

rmeansother than Said knife for driving` Said, Sharpener, means formoving said Sharpener.` into contact with said knife, and means forlocking said Sharpener 1n this position.

33. In a slicing machine having a slicing knife, a Sharpener for Saidknife, resilient means for moving said Sharpener into contact with saidknife, and means for locking Said Sharpener in the position thusassumed.

34. In a slicing machine having a rotary slicing knife, a Sharpener forsaid knife, means for adjusting said Sharpener relative to the cuttingplane of Said knife, and means for locking said Sharpener in adjustedknife grinding positions and against such movement.

35. In a slicing machine having a slicing knife, a Sharpener for saidknife, means for resiliently moving said Sharpener into con- -tact withSaid knife where it is held by Said knife against the tension of saidresilient means, and means for locking said Sharpener in the positionthus assumed.

36. In a slicing machine having a rotary slicing knife, a grinding wheelfor said knife, means for movingsaid wheel into contact with said knife,means for subsequently locking said wheel in the position thus assumed,and means for rotating said knife while Said Sharpener is locked in thisposition to cause said Sharpener to true the edge of said knife.

37. In a slicing machine having a rotary slicing knife, a Sharpener Wheefor said knife, resilient means for moving said wheel into contact withsaid knife where it is held by said knife against the tension of saidresilient means, means for subsequently locking said wheel againstmoving bodily relative to said knife, and means for rotating said wheeland knife while thus pos1- tioned relative to one another to Sharpensaid knife and to true the edge thereof.

38. In combination, a rotary Sharpener for a rotary slicing knife, meansfor causing said Sharpener and knife to Contact With one another nearthe peripheries thereof, and means for drivingthe contacting portions ofsaid knife and Sharpener in the same general y. dlrectlon, said drivmgmeans being arranged to lmpart a more rapid linear movement tol" theportion of said Sharpener contacting? with said knife than is impartedto the contacting portion of said knife.

39. In a slicing machine having a rotary slicing knife combination, adrive shaft, means for connecting Said knife with said shaft to bedriven thereby, a rotary grinder for Said knife, .a driving trainconnecting said grinder and said drive Shaft, said train including meansfor breaking the driving connection between said shaft and said grinder,an adjustable support for Said grinder, and a driving connection betweensaid grinder and said driving train arranged to maintain operativeconnection between Said grinder and said train independently of theadiustment of said grinder support.

40. In combination, a Sharpener for a rotary slicing knife, means formoving said Sharpener into contact with said knife, and positive meansfor preventing movement of Said Sharpener toward said knife beyondaposition fixed by said means.

41. In combination, a grinder for a rotary slicing knife, resilientmeans for moving Said grinder into contact with said knife, positivemeans for preventing movement of said grinder toward Said knife beyond aposition fixed by said positive means, and mechanism other than Saidknife for'driving Said grinder.

42. Ina slicing machine, a Sharpener for a rotary slicing knife` meansother than said name to this specification on this 7th day of July, A.n. 1916. HENDRIK STUKART;

